DE525721C - A switch controlled by a slowly moving member, in particular a thermostab - Google Patents

Description

GERMAN EMPIRE

ISSUED ON May 28, 1931

REICH PATENT OFFICE

PATENT LETTERING

JVi 525721 CLASS 21c GROUP

S. 78313 VIIIV21 & Date of publication of the patent grant: May 7th

Siemens & Halske Akt-Ges. in Berlin-Siemensstadt *)

It is a known measure, when contact is made by a slow-acting switching element, For example, a thermal strip to arrange a spring serving as an additional force, so that the switching element is in stable equilibrium in the end positions. This achieves that the contact pressure increases, the contact movement accelerates and thus a creeping one Contact is avoided.

The disadvantages of this arrangement is that on the one hand a very powerful thermostab is required and on the other hand, once a contact is closed, it is not always as fast as is desirable, is opened, are avoided according to the invention in that the contact arm of the Switching member is resilient.

The known embodiment is shown in Fig. 1. There is 1 clamped in at point 2 Bimetal spiral, which changes its shape

ao transfers to a shaft 3 and a switching arm 4 when heated or cooled. The switch arm causes through its contact pieces 8 the closing of circuits at its mating contacts 6 and 7. In this embodiment, the additional force is provided by a tension spring 5 formed.

An example of an arrangement according to the invention is shown in the diagram in Fig. 2. Here 1 'is a thermostab that is wrapped around its heating coil 12. It is attached to his free end extended by a resilient switching arm 4 ', which in its end positions spring contacts close at 6 'and 7'. A quick contact closure occurs by the interaction of the elastic switching arm 4 'with the force of two magnets 14 and 14 'comes about by an armature 13 on the switching arm 4' in advance of the Thermostab is attracted and held by one of the magnets.

Depending on the position of the switching arm 4 ', the contacts 6' or 7 ', for example Lamps 9 or 10 or other devices from the battery 11 are fed. If the Armature 13 is held by the magnet 14 is a circuit via a contact 15 in which the heating coil 12 is closed, so that after some time the thermostat as a result of his Warming curves to the other side. This finally the arm 4 'of the Contact 6 'quickly detached, lagging behind the thermostab, and to contact 7' moved over and interrupted the heating of the thermostat. After cooling down sufficiently the arm 4 'returns to its starting position.

The invention has the advantage that the thermostat is dimensioned much smaller can be as in an embodiment, as shown for example Fig. 1, where by the Thermostab considerable mechanical work has to be done.

*) The patent seeker stated as the inventor:

Leo Brandenburger in Berlin-Halensee.

Because of its small size, the thermostat only needs a lower heating output, what is also a benefit achieved by the invention.

You can use a spring as an additional force in this arrangement, such as in the known design in Fig. i. But it is better to use the power of magnets, because this decreases quickly after being removed,

ίο so that a quick opening of the contacts is achieved

; ■ will. The magnets are expediently provided with a regulating device, e.g.

It goes without saying that the inventive concept can also be used if only one-sided contact should be made.

For this purpose, for example, the magnet 14 'will be omitted or the contact at 7' replace with a simple stop.

In Fig. 3 another possibility is sketched, for example, one instead of two magnets To arrange magnets 17, the poles 15 and 16 alternately tighten the anchor 13 '.

Claims (3)

Patent claims: i. Controlled by a slowly moving limb, especially a thermostat Switch, the moving contact attached to the control member under action of additional forces that pull him into the end positions, characterized in that that the switch contact is arranged on an elastically flexible extension of the controlling member, such that he is snapping slowly ahead of himself or behind him moving control member is moved into the end position or removed from it. 2. Switch according to claim 1, characterized in that a toggle spring is arranged is that exerts the additional forces. 3. Switch according to claim 1, characterized in that one or more magnets are arranged, which exert the additional forces. 1 sheet of drawings